diff --git a/Assets/VRM10/Runtime/IO/Texture/Vrm10TextureDescriptorGenerator.cs b/Assets/VRM10/Runtime/IO/Texture/Vrm10TextureDescriptorGenerator.cs
index 293fe0980..d1bce792d 100644
--- a/Assets/VRM10/Runtime/IO/Texture/Vrm10TextureDescriptorGenerator.cs
+++ b/Assets/VRM10/Runtime/IO/Texture/Vrm10TextureDescriptorGenerator.cs
@@ -84,7 +84,7 @@ namespace UniVRM10
             var name = TextureImportName.GetUnityObjectName(TextureImportTypes.sRGB, gltfImage.name, gltfImage.uri);
             if (string.IsNullOrEmpty(name))
             {
-                name = "thumbnail";
+                name = MigrationVrmMeta.THUMBNAIL_NAME;
             }
 
             GetTextureBytesAsync getThumbnailImageBytesAsync = () =>
diff --git a/Assets/VRM10/Runtime/Migration/MigrationVrmMeta.cs b/Assets/VRM10/Runtime/Migration/MigrationVrmMeta.cs
index d2975f420..656e8f4ed 100644
--- a/Assets/VRM10/Runtime/Migration/MigrationVrmMeta.cs
+++ b/Assets/VRM10/Runtime/Migration/MigrationVrmMeta.cs
@@ -27,6 +27,8 @@ namespace UniVRM10
     // },
     public static class MigrationVrmMeta
     {
+        public const string THUMBNAIL_NAME = "__VRM10_thumbnail__";
+
         public static UniGLTF.Extensions.VRMC_vrm.Meta Migrate(UniGLTF.glTF gltf, JsonNode vrm0)
         {
             var meta = new UniGLTF.Extensions.VRMC_vrm.Meta
@@ -69,7 +71,7 @@ namespace UniVRM10
                                 if (string.IsNullOrEmpty(gltfImage.name))
                                 {
                                     // fall back default name
-                                    gltfImage.name = "__VRM10_thumbnail__";
+                                    gltfImage.name = THUMBNAIL_NAME;
                                 }
                             }
                             break;